Battery lamp



April 11, 1939. s ss 2,153,814

BATTERY LAMP Filed April 26, 1958 7 -/I IF Patented Apr. 11, 1939 UNITED STATES PATENT OFFICE 2 Claims.

My invention has for its object to provide an "efllcient means for readily assembling battery lamps in accurate location with respect to the reflectors commonly used in connection with lamps referred to as spotlights, or "searchlights".

The inventionparticularly provides means for accurately locating the light-producing element in the focus of the reflector toproduce projection of substantially parallel rays.

The invention also provides a resilient means for securing a lamp in position relative to the reflector for preventing injury to the filament by jarring when in use.

The invention thus provides a means whereby the reflector may be formed of sheet metal stampings and the filament accurately located by a simple means that may be readily formed and assembled whereby the lamp embodying my invention may be produced at a relatively low cost.

Lamps containing the invention may be varied in their forms and to illustrate a practical application of the invention, I have selected a battery lamp as an example of structures that contain the invention and shall describe the selected structure hereinafter. The particular battery lamp selected is shown in the accompanying drawing.

Fig. 1 is a view of a battery lamp of the type 30 commonly used and containing my invention.

Fig. 2 is a view of .the electric lamp and a section of the reflector.

The battery lamp, as shown in Fig. 1, is provided with the usual shell I in which are located 3 the cells 2 that form the battery. The reflector 4 is provided with a flange 5 and the flange 5 and the lens I are located intermediate the edge of the one end of the shell and a clamping ring 8. The lamp bulb III is connected to a base member ll having the usual contacts for connecting the fllament of the lamp in the circuit of the cells 2. It is provided with a sleeve contact i2 that is electrically connected to the reflector and a central contact l4. The cells 2 are spring-pressed 45 by means of a spring l5 to press the terminal I! of the battery against the contact l4. The spring l5 makes contact with shell I and the metal wall of one of the cells. The flange 5 of the reflector is covered with insulating material to electrically insulate the reflector and lamp from the shell. A slidable contact I8 is connected to a-flnger member 20 through a slot formed in the wall of the shell. The contact I8 is located in position to engage the metal of the reflector 4 55 when the finger member is moved towards the reflector. Thus, the circuit of the battery through the lamp may be completed by means oi. the switch formed by the movable contact I S Z The reflector 4 has a threaded hollow hub part go 2|, and a ring 2218 located in the hub. The

ring 22 is provided with an inwardly extending flange 24 located at one edge of. the ring and an outwardly extending flange 25 that protrudes from the other edge of the ring. The flange 25 is located in contact with theedge of the hub 2|. 5 The hub may be accurately ground with respect to the focus of the reflector to locate the flange 24 in an accurate position with reference to the focus of the reflector when the ring is inserted in position in the hub. The lamp is provided with a flange 2! disposed at one end of the sleeve con-. tact l2 of the base member II and contiguous to the bulb III to locate the lighting element or fllament 28 in the focus of the reflector 4 when the flange 21 is placed against the flange 24 and produce projection of substantially parallel rays of light from the lamp.

A spring 30 is located within the hub 2| and within the ring 22 and about the base member ll of the lamp. A ferrule 3| is threaded onto the base member to press the spring against the flange 21 and the flange 21 against the flange 24 of the ring 22 and the flange 25 against the edge of the hub of the reflector to resiliently secure the lamp filament 28 in the focus of the reflector and support the lamp as against shock and hold the lamp in position against the pressure of the cells 2 produced by the spring I5.

I claim:

1. In a battery lamp, a reflector formed of sheet metal and having a short hollow exteriorly threaded hub part, a ring located within the hub part and having inwardly and outwardly extending flanges located at the edges of the ring, an electric lamp having a bulb and a base member, the base member having a flange, a spring located in the hub, and an interiorly threaded ferrule surrounding the base of the lamp for pressing the spring against the flange of the base member and the flange of the base member against the inwardly extending flange of the ring and the outwardly extending flange of the ring against the edge of the hub.

2. In a battery lamp, a reflector formed of sheet metal and having a short hollow hub part, a ring located within the hub part and having an inwardly extending flange located at one end edge 0f the ring and proximate to the reflecting surface of the reflector and an outwardly extending flange located at the other end edge of the ring, an electric lamp having a bulb and a base member, the base member having a flange located at one end of the base member, and means for pressing the flange of the base member against the inwardly extending flange oi the ring and the outwardly extending flange of the ring against the edge of the hub for securing the lamp filament in a predetermined position with reference to the reflector and the outer end of the hub.

AUGUST J. SEISS. so 

